The Meridian Option M2616D telephone is specifically designed for users who require multiple lines. The Meridian M2616D offers quick access to a wide range of features. The basic 16 programmable keys can be increased to 38 or 60 by adding one or two 22 button Key Expansion Modules. Additional features of the M2616D include high quality built-in handsfree communications, dual handsets, headset facility and built-in display.